| 摘要 |
PROBLEM TO BE SOLVED: To provide the disk drive of a perpendicular magnetic recording system, wherein the disk recording medium of a perpendicular double-layer structure, and a GMR element as a reading head are combined. SOLUTION: The disk drive of a perpendicular magnetic recording system is provided with the disk 101 of a perpendicular double-layer structure, and a magnetic head 103 including a reading head 8 as a GMR element 11. The GMR element 11 has a linear response dynamic range characteristic larger than the average value of a reproducing magnetic field from the disk 101, and a characteristic capable of evading or suppressing a saturation phenomenon even when there is an effect of a strong reproducing magnetic field.
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